Not hearing gunshots etc? Try this:

What seems to work for me is "flush" your game. To do this hold shift + press minus on the numpad then type flush. Game will go black for a minute then come back. I tested this out with my buddy, before I did I couldn't hear his SKS, but when I flushed I could....this was tested on the same server. My sound was also on 128 setting before/after

What seems to work for me is "flush" your game. To do this hold shift + press minus on the numpad then type flush. Game will go black for a minute then come back. I tested this out with my buddy, before I did I couldn't hear his SKS, but when I flushed I could....this was tested on the same server. My sound was also on 128 setting before/after